Section lV TROUBLESHOOTING SYMPTOM INDEX
Detailed troubleshooting procedures are provided in chapters 4 thru 12 of this manual. The proce-
dures are arranged by subsystem categories under Malfunction Symptoms. The following composite
Malfunction Symptom Index provides a cross reference to the troubleshooting procedures contained
in the other chapters.
Table 3-2. Composite Troubleshooting Symptom Index
Backup lamp(s) inoperative.
All electrical systems are weak.
Engine fails to crank or cranks slowly.
Batteries do not hold a charge.
BLACKOUT LIGHTING SYSTEM.
All blackout lamps inoperative.
One blackout marker, headlamp, tail lamp, or
stop lamp inoperative.
Trailer blackout lamps inoperative.
Batteries are being undercharged or overcharged.
COMPRESSED AIR AND BRAKE SYSTEMS.
Insufficient air pressure.
Excessive system pressure indicated.
Park brakes will not release.
Trailer brakes will not release.
Service brakes will not release (one wheel only).
Service brakes will not apply.